Materials Literature
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Several strategies aimed at sorting single-walled carbon nanotubes (SWNT) by diameter and/or electronic structure have been developed in recent years. A nondestructive sorting method was recently proposed in which nanotube bundles are dispersed in water-surfactant solutions and submitted to ultracentrifugation in a de…
We performed photoluminescence (PL) spectroscopy on single carbon nanotubes to investigate the satellite PL peaks, which are much lower in energy than the lowest $({E}_{11})$ bright exciton peak. From the temperature and tube-diameter dependences of the PL spectra, we clarified two origins of the low-energy PL peaks.…
Crystallization of [Ag(14)(C[triple bond]CtBu)(12)Cl][BF(4)] and different polyoxometalates in organic solvents yields a series of new intercluster compounds: [Ag(14)(C[triple bond]CtBu)(12)Cl(CH(3)CN)](2)[W(6)O(19)] (1), (nBu(4)N)[Ag(14)(C[triple bond]CtBu)(12)Cl(CH(3)CN)](2)[PW(12)O(40)] (2), and [Ag(14)(C[triple bo…
The phase-field crystal approach describes the dynamics of the local atomic probability density on atomic length and diffusive time scales. However, the small grid spacing required to resolve the atomic length scale restricts the applicability to relatively small systems. We present a new amplitude-equation formulatio…
A nearly perfect hydrophobic interface by dint of mimicking hairs of arthropods was achieved for the first time. These Gamma-shape artificial hairs were made via a membrane casting technique on polypropylene substrates. This extreme hydrophobicity merely arises from microstructure modification, and no further chemical…
Abstract In the past 3 decades, there has been great advancement in the preparation of microcellular thermoplastic polymer foams. However, little attention has been paid to thermoplastic elastomers. In this study, microcellular poly(ethylene‐co‐octene) (PEOc) rubber foams with a cell density of 2.9 × 1010 cells/cm3 an…
Sr(5)(PO(4))(3)Cl:Eu(2+) nanorod bundles were successfully prepared through a facile hydrothermal method. The X-ray diffraction (XRD) and FT-IR results demonstrate that the product is a pure hexagonal phase of Sr(5)(PO(4))(3)Cl. The scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-r…
We describe a remarkably simple, generic, coarse-grained model involving anisotropic interactions, and characterize the global minima for clusters as a function of various parameters. Appropriate choices for the anisotropic interactions can reproduce a wide variety of complex morphologies as global minima, including s…
It has been recently discovered that the synthesis of Al-Ge imogolite-like nanotubes is possible at high concentration. Despite this initial success, the structure of these Al-Ge imogolite-like nanotubes remains not completely understood. Using high resolution cryo-TEM and Small Angle X-ray Scattering, we unravel thei…
The microscopic structures of cross-linked natural rubber (NR) were investigated by means of contrast-variation small-angle neutron scattering (CV-SANS) coupled with “visualization-by-swelling method” as a function of dicumyl peroxide (DCP; cross-linker) content, where the various types of inhomogeneities in the rubbe…
The effects of annealing on the magnetic properties of nanocrystalline Ni 1− x Zn x Fe 2 O 4 ( x = 0.2, 0.4) have been studied. The as-prepared x = 0.2 and 0.4 samples with the particle size of about 6 nm present a relatively low blocking temperature of about 47 and 53 K, respectively, as derived from the peak of the…
Abstract Three types of acrylonitrile‐butadiene‐styrene rubbers with different rubber contents were used in the preparation of PC/ABS/MWCNT composites. It was found that localization of MWCNTs changes from PC to ABS phase when rubber content of ABS varies from 5 to 60%. This is discussed by a combination of thermodyna…
The phase behavior of supported thin film mixtures ( h ∼ 120 nm thick) of polystyrene (PS) brush-coated spherical nanoparticle and PS homopolymers is characterized by three regimes, depending on P, the degree of polymerization of the PS host, and N, the degree of polymerization of the grafted chains. Phase separation…
To understand more about the influence of the types of interaction between drug and PEGylated PAMAM dendrimers on the in vitro and in vivo behavior of drug, methotrexate (MTX) was coupled to PEGylated or non-PEGylated generation 4 PAMAM (G4) through complexing drug within the dendritic architecture and covalently conj…
The development of technologies that would lead toward the adoption of a hydrogen economy requires readily available, safe, and environmentally friendly access to hydrogen. This can be achieved using the aluminum-water reaction; however, the protective nature and stability of aluminum oxide is a clear detriment to its…
DC-magnetron sputtering with an Ag target on textile surfaces produced Ag particles with sizes approximately 4.7 nm (+/-15%). Sputtering for 15 s led to Ag layers of 15-20 nm. The threshold sputtering time precluding airborne bacterial growth was about 60 s. In this case, the coating was approximately 40-50 nm thick a…
ZnFe 2 O 4 nanoparticles with sizes between 3 and 20 nm have been prepared nonembedded and embedded in an amorphous SiO 2 matrix. All the samples are ferrimagnetic below the blocking temperature that presents similar values for all of them, indicated by the maxima in the ZFC/FC curves. However, the embedded nanopartic…
The high-pressure, high-temperature conditions for the synthesis of Zn-rich (Ga 1− x Zn x )(N 1− x O x ) solid solutions from mixtures of ZnO/GaN were explored using synchrotron-based in situ time-resolved X-ray diffraction (XRD). Following a new synthetic path, (Ga 1− x Zn x )(N 1− x O x ) solid solutions with a Zn c…
Extended X-ray absorption fine structure spectroscopy (EXAFS) was used to determine the interatomic distances in both strain-free and strained thin films of Ce0.8Gd0.2O1.9. It was found that in response to compressive strain, the Ce4+ ion undergoes an anomalously large shift away from the oxygen vacancy. This finding…
Mechanical properties of layered silicates on the nanometer scale have been associated with large uncertainty. We attempt to clarify the linear elastic properties including tensile moduli, shear moduli, and potential failure mechanisms for the minerals pyrophyllite, montmorillonite, and mica in the order of increasing…